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Unformatted text preview: Highest bond energy? Shortest bond length? O 2 , O 2-, O 2 2-7. The structure for caffeine, present in coffee and many soft drinks, is shown below. How many bonds are present in caffeine? How many bonds? Insert the lone pairs in the molecules. What kind of orbitals to the lone pairs occupy? C C C N N C N CH N O O CH 3 C H 3 CH 3 8. The structure for acetylsalicylic acid (aspirin) is shown below. How many bonds are present in aspirin? How many bonds? C CH C CH C H C H C OH O O C O CH 3 9. Draw Lewis structures and MO diagrams for CN + , CN, and CN-. According to the Lewis structures, which species is most stable? According to MO theory, which species is most stable? Do the two theories agree? 10. The species NO 2 + , and NO 2-, in which N is the central atom, have very different bond angles. Predict what these bond angles might be. What would you predict for NO 2 ?...
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- Summer '04